Who is Ozymandias?

Quote from the related link: "Ozymandias was another name for Ramesses the Great, Pharaoh of the nineteenth dynasty of ancient Egypt.[4]"

Alternatively, from the second related link: "Ozymandias(prn. ah-zee-MAN-dee-əs), real name Adrian Veidt, is a fictional character appearing in the comic book limited series Watchmen by Alan Moore and Dave Gibbons, published by DC Comics."